//add and remove
Collection<KnowledgePackage> kpkgs = SerializationHelper.serializeObject( loadKnowledgePackages( "test_Dynamic1.drl" ) );
String pkgName = kpkgs.iterator().next().getName();
kbase.addKnowledgePackages( kpkgs );
kbase.removeKnowledgePackage( pkgName );
kbase = SerializationHelper.serializeObject( kbase );
//add and remove again
kpkgs = SerializationHelper.serializeObject( loadKnowledgePackages( "test_Dynamic1.drl" ) );
pkgName = kpkgs.iterator().next().getName();